Magnetism Versus LiFePO4 Battery’s State of Charge: A Feasibility Study for Magnetic-Based Charge Monitoring

Thomas Gallien; Heinz Krenn; Roland Fischer; Stefan Lauterbach; Bernhard Schweighofer; Hannes Wegleiter

doi:10.1109/TIM.2015.2437634

Magnetism Versus LiFePO₄ Battery’s State of Charge: A Feasibility Study for Magnetic-Based Charge Monitoring

Thomas Gallien, Heinz Krenn, Roland Fischer, Stefan Lauterbach, Bernhard Schweighofer, Hannes Wegleiter

Research output: Contribution to journal › Article › peer-review

Abstract

In recent years, lithium ion batteries have become wide-spread energy sources for various battery-powered applications. In particular, LiFePO₄ batteries are increasingly used for high-power automotive and storage applications. Unfortunately, the state of charge (SOC) is not uniquely determined by measuring just the LiFePO₄ battery's open-circuit voltage. However, an alternative approach for SOC determination is introduced by investigating the battery's magnetic susceptibility. This is motivated by the iron atom's magnetic state in the LiFePO₄ cathode material, which changes during charging and discharging. The magnetic susceptibility of differently charged battery samples will be investigated to correlate the magnetic moment with the SOC in view of a new sensor concept.

Original language	German (Austria)
Article number	7150400
Pages (from-to)	2959-2964
Number of pages	6
Journal	IEEE Transactions on Instrumentation and Measurement
Volume	64
Issue number	11
DOIs	https://doi.org/10.1109/TIM.2015.2437634
Publication status	Published - 1 Nov 2015
Externally published	Yes

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https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=7150400

Cite this

@article{a80c6a2ebe93453ea8087b2c229f9489,

title = "Magnetism Versus LiFePO4 Battery{\textquoteright}s State of Charge: A Feasibility Study for Magnetic-Based Charge Monitoring",

abstract = "In recent years, lithium ion batteries have become wide-spread energy sources for various battery-powered applications. In particular, LiFePO4 batteries are increasingly used for high-power automotive and storage applications. Unfortunately, the state of charge (SOC) is not uniquely determined by measuring just the LiFePO4 battery's open-circuit voltage. However, an alternative approach for SOC determination is introduced by investigating the battery's magnetic susceptibility. This is motivated by the iron atom's magnetic state in the LiFePO4 cathode material, which changes during charging and discharging. The magnetic susceptibility of differently charged battery samples will be investigated to correlate the magnetic moment with the SOC in view of a new sensor concept.",

keywords = "Magnetic susceptibility, Batteries, Magnetic materials, Sensitivity analysis, Lithium batteries, Magnetic hysteresis",

author = "Thomas Gallien and Heinz Krenn and Roland Fischer and Stefan Lauterbach and Bernhard Schweighofer and Hannes Wegleiter",

year = "2015",

month = nov,

day = "1",

doi = "10.1109/TIM.2015.2437634",

language = "Deutsch ({\"O}sterreich)",

volume = "64",

pages = "2959--2964",

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TY - JOUR

T1 - Magnetism Versus LiFePO4 Battery’s State of Charge: A Feasibility Study for Magnetic-Based Charge Monitoring

AU - Gallien, Thomas

AU - Krenn, Heinz

AU - Fischer, Roland

AU - Lauterbach, Stefan

AU - Schweighofer, Bernhard

AU - Wegleiter, Hannes

PY - 2015/11/1

Y1 - 2015/11/1

N2 - In recent years, lithium ion batteries have become wide-spread energy sources for various battery-powered applications. In particular, LiFePO4 batteries are increasingly used for high-power automotive and storage applications. Unfortunately, the state of charge (SOC) is not uniquely determined by measuring just the LiFePO4 battery's open-circuit voltage. However, an alternative approach for SOC determination is introduced by investigating the battery's magnetic susceptibility. This is motivated by the iron atom's magnetic state in the LiFePO4 cathode material, which changes during charging and discharging. The magnetic susceptibility of differently charged battery samples will be investigated to correlate the magnetic moment with the SOC in view of a new sensor concept.

AB - In recent years, lithium ion batteries have become wide-spread energy sources for various battery-powered applications. In particular, LiFePO4 batteries are increasingly used for high-power automotive and storage applications. Unfortunately, the state of charge (SOC) is not uniquely determined by measuring just the LiFePO4 battery's open-circuit voltage. However, an alternative approach for SOC determination is introduced by investigating the battery's magnetic susceptibility. This is motivated by the iron atom's magnetic state in the LiFePO4 cathode material, which changes during charging and discharging. The magnetic susceptibility of differently charged battery samples will be investigated to correlate the magnetic moment with the SOC in view of a new sensor concept.

KW - Magnetic susceptibility

KW - Batteries

KW - Magnetic materials

KW - Sensitivity analysis

KW - Lithium batteries

KW - Magnetic hysteresis

UR - https://ieeexplore.ieee.org/document/7150400/

U2 - 10.1109/TIM.2015.2437634

DO - 10.1109/TIM.2015.2437634

M3 - Artikel

SN - 1557-9662

VL - 64

SP - 2959

EP - 2964

JO - IEEE Transactions on Instrumentation and Measurement

JF - IEEE Transactions on Instrumentation and Measurement

IS - 11

M1 - 7150400

ER -

Magnetism Versus LiFePO4 Battery’s State of Charge: A Feasibility Study for Magnetic-Based Charge Monitoring

Abstract

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Magnetism Versus LiFePO₄ Battery’s State of Charge: A Feasibility Study for Magnetic-Based Charge Monitoring